1. Is it safe / Allowed to go for my transition to happen from Non - Immigration visa F1 to GC 2. Which service center to apply

I would seek independent counsel regarding your situation. Adjustment of status is not guaranteed by any means so this is something to keep in mind.

Majority of people apply which visa K1 or K3 ?Which visa has more background check K1 or K3?what are the chances of rejection ?

Processing times are similar for the k1 or k3.

How can my mistake be rectified?

This is a duplicate post. Please see response on prior post.

How can I rectify my mistake for those 48 days?

You need to discuss this with your h1b employers immigration attorney as they will be the attorneys of record. You can also seek independent advise...

Have an approved H1B petition with consulate approval. Currently in US on L1 visa. Can i go to Canada for H1B stamping instead

You will need to make the trip to India. Also I would be addressing these questions with your company's immigration counsel as they know your...

I would set up an independent consultation with a qualified immigration attorney. Also see...

Please rephrase the question and explain what you mean by "irrevocable divorce"?

Will my US Citizenship get rejected

You should talk to a qualified immigration attorney. Based on what you have relayed, it may still be possible to apply for naturalization so I...

How much time needs to pass between the naturalization and a divorce to not cause any accusation of fraud?

If you had a bona fide marriage and met the requirements (residing with your spouse and being married among other requirements) during the...

Will my abandoned/withdrawn f-4 sibling petition affect my chances of getting a visit visa?

The consular officer is looking to see your strong ties to the home country for the visitors visa and you must be able to demonstrate it. They can...